RFR: 8370240: [PPC64] jhsdb jstack cannot handle continuation stub

[Christoph Langer]

On Mon, 20 Oct 2025 14:56:32 GMT, David Briemann <dbriemann at openjdk.org> wrote:

> This is a port of 8369979 for PPC. It allows to calculate caller SP from `CodeBlob` for continuation stub.
> It also enables the test `test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackWithVirtualThread.java` for PPC.

test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackWithVirtualThread.java line 40:

> 38:  * @bug 8369505
> 39:  * @requires vm.hasSA
> 40:  * @requires (os.arch == "amd64" | os.arch == "x86_64" | os.arch == "aarch64" | os.arch == "riscv64" | os.arch == "ppc64" | os.arch == "ppc64le")

Is there still an arch that is unsupported? Otherwise the whole line can be dropped, no?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27902#discussion_r2446763380